wireing a digital thermostat/ honeywell rth3100c
By missbutts
@missbutts (1)
United States
November 21, 2006 8:00pm CST
i only have a hole in wall with wires coming out no tags on them white black yellow red blue green ,orange my new thermostat has e aux y g o l r b c said c is optional with batteries WHAT DO I DO ?
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